Machine for making composition plugs



I. E. FARR. MACHINE FOR MAKING COMPOSITION PLUGS.

R, HT m E 3H .0. N 3H NF, R .4 EMm W N T n H M 1 2 D 4/ w m APPLICATION FILED JULY 5,1919- I. E. FAR R.

MACHINE FOR MAKING COMPOSITION PLUGS.

APPLlCATlON FILED JULY 5,1919. I I

4 Patented Aug. 3, 1920'.

INVENTOR.

Ira E Farr ping and other paper.

UNITED. srATss JENTJ O F CE-i IRA E. FARR, or wA'rERTowN, NEW YORK, AssIGNoR'oF ONEFHALF TOiMATHEW m.

' B'AGG, or WATERTOWN, NEW YORK,

MACHINE FOR MAKING COMPOSITIQN PLUGS.

Specification of Letters Patent; Patented A g 3; 192() Application filed July 5, 1919. Serial No. 308,758.

scribed in my United States Patent l,2atS,U97, dated November 27, 1917.

The object ofthe invention is to provide novel, simple and inexpensive. mechanism for molding under j pressure composition plugs or bushings, to take the place of. the

.commonwooden plugs heretofore employed for centering and supporting rolls of wrap- A further object is to provide a machine for making plugs in which a pluralityof molds are continuously rotated for successively bringing said molds into the charging, compression and dis charging positions, and wherein, novel and simple timing parts cooperate for rendering the machine automatic. And a particular object is to provide a powerful automatic rotary machine of the class, which is capable of compressing a pasty composition into light,

compact plugs, which will retain their shape and size, and which, can be made in large numbers at a relatively low cost.

I attain these ob'ects by themeans set forth inthe detailed description which follows, and as illustrated by the accompanyin" drawings, in which Figure 1.is a front end elevation of the complete machine. Fig. 2 is a front side elevation of the same. F-ig. 3 is a vertical transverse section, taken on line 3--3, of Fig. 1; showing oneof the compression camsin relation to other parts of the device. Fig.4 is a vertical longitudinal seotion, taken on line 44 of Fig. 1. Figs. 5 and 6 are respectively an end and an edge view enlarged of one of the plugs molded by the machine. Fig. 7 is a view'of one of the rotary cams which look the mold covers.

' In the drawings, 2 represents generally a frame preferably made out of castiron, having a suitable base 3, and .front and rear end portions a and 5. The power for operating the working parts of the machine may be supplied from any source, and is applied to a main shaft 6, which is journaled in pillowblocks 4 and. 5, and is held in place by eaps 4 and 5. 7 is a relatively large and heavy cylinder or drum, whlch is mounted upon and driven by the shaft 6 by means of a key 3. The cylinder 7 is preferably castiron, and is provided at its opposite ends with heavy annular flanges 7. Inside of the flanges 7 the drum is provided with longitudinal radial slots or windows 8, which are spaced equidistantly around the drum. On the peripheral faceof the drum -7' and in line with the slots 8, are disposed a number of blocks. 9, which extend longitudinally substantially the length of the drum, and these blocks are secured to the drum by bolts 9 .(see Fig. 4) Each block 9 is provided with a pair of relatively-large circular sockets 9, whose axes register-with corresponding circular sockets 10 formed in the periphery of the drum, the latter registering and communicating with the slots 8.

'In the sockets'9 are disposed the tapering molds, in which the plugs 11' are made under pressure. The molds 11 are preferably made by expanding one end of. brass or other suitablemetal tubes, the bodies 11 of which project throughthe-blocks 9 and partially through the flan'ge'rim of the drum,

preferably concentric to the sockets 9 and 10. The outer ends of the sockets 9 are preferably larger than the flaring molds 11, so as to provide a suitable space to be filled with molten lead 9", which rigidly holds the molds in place. The sockets 10 are of relatively-large diameter so as toaccommodate various sizes of the molds 11 without necessitating the alteration of the drum 7. The

plugs, 11 are preferably made out of a afterward compressed and molded into solid and substantially dry masses by means of plungers 12, which reciprocate in the tubes 11*. The plungers 12 are mounted on the outer threaded ends of hollow rods 12,

while the inner ends of said rods are made rigid in cross-heads 13, "which play radially in the slots 8. Each cross-head 13 supports and operatestwo of the plungers 12, as best seen in Fig. 4. As the plugs 1l,must be perforated centrally, to receive the shafts which support the rolls of paper, this is accomplished by cores 14, 'whiclrare dis-' posed centrally in the molds 11. The upper ends of the-coresare preferably flush with the outer ends ofv the. molds .11, and the .cores, then extend inwardly through the plungers 12, the rods 12', and through the 'crossheads 13, and their inner ends are rigidly anchored in the web of the drum 7,

as at 14'. The opposite ends of each cross head extend beyond the ycorresponding the drum is-inconstant rotation. In order to suitably confine the pulp in the molds 11' during the compression of the plugs, the

outer face of each block 9 is provided with 'two plates 16-'-1,6, each of which has'a group or perforations 16 ,-which are nor mally disposed .over the 'mouths of the moldsll, and through which the Water contained in the composition escapes during the molding operations. The plates 16 are secured at their opposite ends by parallel .bars 17, whichare disposed alongside of the blocks 9. All-of the bars 17 project a considerable distance beyond the'opposite ends of the blocks 9 (see Figs. 2 and 4), and are held in place by a plurality of dogs 18, whose stems 18 are loosely inserted through holes in the flanges 7 "ofthe drum. The heads of the dogs18 are slotted to receivethe bars 17, and said bars are movable longitudinally when the tensionon-the dogs is relaxed, for effecting theshifting of the plates 16 for uncovering the molds, as shown inFig. 2, for permitting. the ejection of the plugs and the refilling ofthe molds with the wet composition. The inner ends of the stems 18' pass through tie-plates 18*, which are held in place by nuts 18". The portion of the stems 18 which extends between the drum and 'the heads of the dogs arefitted with com pression springs 18, which tend to relax the grip of the dogs on the bars 17, and permit said bars to be .reciprocated for uncovering as well as covering the molds. I

As theoperation of the machine is innow be described.

'means, for opening the molds for the discharge of the plugs, for filling the molds with fresh charges of the pulp, for closing the molds again, and for holding the covers 16 in place dur ng the compression operations. The varioustiming attachments will 19 represents a series of pinions, which are journaled on shafts 19", the latter being rigidly set in the opposite ends of the drum 7 ,in line with the'slots 8, as shown in Figs. 1 and 4. The pinions 19 are rigid with cams 20, which rotate in circular sockets 20 cut in'the'flanges 7, at'the opposite ends of the drum (see Figs. 3 and i). These cams are so arranged that their throwpoints successively engage the tie-plates 18 which are attached to the stems 18 of the dogs,'and when so engagedthe said cams draw the dogs inwardly against the'tension 'of the springs 18, for holding the plates 16-16 in both the closed and the open po sitions, shown in Figs. 1, 2 and 4:. V The cams 20 are operated intermittently by pinions 19, by means of mutilated racks 2121 and 21' 21", as best seen in Figs. 1 and 4:. The bars 17 which support the plates 16 are moved endwise for uncovering the molds, by

a wedge-like cam or shift 22," which is mounted on a bracket 22, the latter being supported by the base 3 (see Figs. 1 and 4). The bars 17 are moved in the opposite direction for re-covering the molds 11- by a similar wedge-cam 22 mounted on a'br'acket.

22, which is supported by the cap 5 (see Figs. 1, 2, 4c). The mechanisin'for filling the molds with the pulp is preferably a sepa-' rate attachment and its not shown, as any suitable filling means may be employed.

' The operation ofmy rotary plug molding machine is as follows: Assuming that the molds 11 shown in section atthe top of Fig. 1, have been filled,and closed by the'plates 16, and are ready for the compression operation, the roller 13 shown at the end of the plain portion N of the cam 15, at the start of the machine, immediately'beginsto climb the first'rather abrupt rise of. the cam indicated at a. The object of thissteep rise of the cam is to effect a quick initial compression of the pulp which contains-considerable ,water and therefore ofi'er'sless resistance 'to the pressure at the start of the operation,

than it does-lateron after the composition becomes relativelydryand compact. As the drum 7 is rotatedin the direction ofthe arrows in Fig.1, the rollers 13 after ascending the first rise a, continue to climb the cam for a distance of substantially 180, or until the pinion 19 encounters the first series of rack-teeth 21.

a fraction of a turn, which moves the cor-'- The engagement of' the 7 pinion withthesaid teeth rotates the pinion respondingfcam 20 sufficiently to release the the rollers 13 reach the highest points 15 V springs 18 to move thus relaxing their As the drum 7 condogs 18 and allow the said dogs outwardly, grip on the bars 17.

tinues to' rotate, the ends of the bar 17 engagethe first of the wedge-cams, 22, which moves said bars in the direction for simultaneously uncovering the molds 11 of that particular block 9. At the time the pinions 19 engage the teeth 21, the plungers 12 have about completed the compressing of the plug, and are ready to begin the work of ejecting the plugs. This, however, cannot be done until the plates 16 are moved away from the mouths ofthe molds 11. In order to prevent injury to the machine, during the interval between the completion of the plugs and the opening of the molds, the cams 15-- 15 continue for 'aspace indicated by the characters 32-00, for a short distance without any increase of rise. As soonas the pinions become free from the teeth 21, the wedge 22 begins to uncover the molds, as described, and by the time they are uncovered, the pinions 19 engage the second set of teeth 21, which operate the cams 2() for locking the plates 16 in the open position. Vhile this latter work is beingdone, the rollers 13 start to climb the last rise of the cams 15-15, which again is rather abrupt, and causes the plungers 12 to force the completed plugs outwardly free from the molds. The final ejection of the plugs occurs when of the cams, after which the said rollers, the plungers. 12 and the cross-heads 13 gravitate back to the starting points, shown at the left side-of Fig. 1, from whence the cams 15--15, for a distance of substantially 90 describe a true and neutral are, indicated by the letter molds 11 pass the points 15 of the cams 15 15', the filling of the molds is effected in the interval or space indicated by the bracket A '(Fig. 1).- As the refilled molds approach, the wedge 22, the pinions 19 engage the rack-teeth 21, which effects the unlocking of the plates 16 while still in the open position. Then the bars 17 are forced toward the right by the wedge 22 (see Figs. 2 and 4), which moves the plates 16 inthe direction for closing the molds. By the time the molds are closed, as described, the pinions 19 engage the rack-teeth '21", which again locks the plates inthe closed position shown in Figs. land at, ready for a subsequent pressing operation. Each pair of molds 11 in regular order are filled, and their charges compressed, as described, during each revolution of drum 7. But seven of the mold blocks 9, each having two molds 11 are shown in the drawings. In practice twenty or more pairs of molds are provided, and the capacity of eachmachine, when operated at the normal speed of one N, After each set of revolution offthe drum per minute, is ap proximately twenty-five thousand plugs per l laving thus described my invention, what I claim as new and desire to secure by Letters Patent, is c 1. A machine for making composition plugs, including a frame, a rotatable drum journaled in said-frame, said drum having a plurality of radial slots, a plurality of molds-arranged in pairs mounted on the periphery slots, plungers reciprocatable in said molds, a pair of similar cams carried by said frame, and means connecting said plungers with said cams. for effecting the compression strokes of the cams.

2. A machine for making composition plugs, including aframe, a drum rotatable in said frame, a pair of cams carried by said frame and disposed at the opposite ends of said drum, aplurality of molds arranged in pairs mounted on the periphery of said drum, plungers operable radially for compressing composition in said molds, and means, for .operatively connecting said plungers with said cams for effecting the of said drum in line withsaid drum, plungers operable radially for com- 13178581011 of composition in said molds, means for operatively connecting said plungers with said cams for'effecting the compression strokes of said plungers and for ejectingthe plugs from the molds, and a timing mechanism comprising a plurality of pinions and a plurality of mutilated racks-for effecting the opening and closing of said molds while the drum is in motion.

4. A machine for making composition plugs, including a frame, a rotatable drum journaled in said frame, a plurality of molds arranged in pairs mounted on the periphery of said drum, plungers reciprocatable in said molds, a pair of stationary similar cams between which said drum rotates, means forconnecting said plungers and said cams for effecting the compression strokes of said plungers, and wedge-cams.

' heads movable radially in said slots and 0peratively connected to said plungers, said cross-heads provided with end-rollers, and a pair of cams adapted to be engaged by said rollers for effecting the compression strokes of said plungers. 6. A machine for making composition plugs, including a frame, a drum rotatable in said frame, a pair of cams carried by said frame and disposed at the opposite ends of said drum, molds arranged in pairs mounted on the periphery of said drum, plungers operable radially for compressing composition in said molds, means for operatively connecting said plungers with said cams for effecting the compression strokes 'of said plungers, perforated covers for said'molds, means for moving said covers toward and away from said molds while the drum is in motion,-and means for locking the covers in the open as Well as in the closed position.

7. In a machine for making composition plugs, the combination with the frame, of a pair of similar cams" supported by said frame, a rotatable drum journaled in said frame between said cams, aplurality of molds mounted on' the periphery of said drum adapted to be filled with wet composition, plungers for compressing said composition, means engaging said cams and connecting with said plungers for efl'eeting the compression strokes of saidplungers, and means for opening and closing said molds once during each revolution of said drum. 8. In a machine for molding composition plugs, the combination with the frame, of a pair of cams supported'by said frame, a drum journaled in said frame between said cams, a plurality of molds arranged in pairs mounted on said drum adapted to be filled with wet composition, covers for each of said molds, means for moving said covers toward and away from the molds while the drum is inmotion, means for locking said eoversin the open as well as in the closed position, plungers reciprocatable in said molds, meansengaging'saidfcamsand con- I 9. The combination with a frame'and a drum rotatable in said frame, a plurality of molds arrange'd in pairs mounted on the periphery of said drum,=plungers for compressing composition in said molds, cams carried by saidframe for effecting the compression strokes of said plungers,'covers for said'molds, parallel bars supporting said covers, dogs for locking said bars in differentpositions, rotary cams foriholding'said dogsv in the locked positions, pinions for op-, erating said cams, mutilated racks for operating said pinions, and wedge-cams for moving said covers toward and away from said'molds.

10. The combination with iii-frame and a pair of rigid cams supported by said frame, of a drum rotatable between said cams, said drum" having radial slots I and corresponding sockets, cross-heads movable in saidslots in one direction by engagement withsaid cams, a pluralityof blocks mounted on the periphery of said drum having sockets alin ing with the sockets of saiddrum, molds disposed in said. sockets, cores disposedin said molds,plungers reciprocatable in said molds and bored out to receive and slide'on said cores,'covers for said molds, dogs for locking saidcovers in the'closed "and open posi- V .tions, bars for tying each pair of dogs together, cams engagingsaid tie-bars,fpinions 7 for operating'said cams, mutilated racks for operating said pinions at the end of each compression stroke of the plungers, and similar racks for operating said pinions after each refilling of said molds, and means for moving said covers toward and away from said molds.

In testimony whereof I affix my signature.

IRA FARR. 

